Olaplex Nº.4 Bond Maintenance Shampoo is formulated with patented Olaplex Bond Building Technology. Restores, repairs and nourishes to add incredible shine and manageability every time you shampoo using the Olaplex 3-4-5 System.
All Hair Types 
PH Balanced. 
Vegan 
Cruelty-Free 
Gluten Free
Nut-Free 
Paraben Free. 
Phthalates Free. 
Phosphate Free. Sulfate Free
How does Olaplex work?
All hair types (natural, curly, fine, straight, etc.) derive most of their integrity from healthy, properly paired, disulfide bonds. When hair is damaged via thermal, chemical, mechanical or environmental factors, these disulfide bonds are broken apart resulting in single sulfur hydrogen bonds.
What happens after a disulfide bond breaks? There are two reactions that can take place. The first reaction is that the single sulfur hydrogen component pairs with a single oxygen molecule. This makes a perfect pair with no further damage taking place.
The second reaction is where damage occurs. A single sulfur hydrogen molecule will pair with three oxygen molecules creating S03, or what is known as a sulfate group. The protonated sulfate is known as Cysteic Acid. Cysteic acid then eats the protein out of the hair.
In the case of chemical services, OLAPLEX works by pairing with the single sulfur hydrogen bond faster than the three oxygen molecules can.
Olaplex Nº.4 Bond Maintenance Shampoo can be used on all 100% human hair extensions.
Some extensions have a Keratin coating on them which can sometimes act as a barrier to the OLAPLEX Treatment. Extensions sometimes are treated with textile dyes which can lead to unpredictable results with Color or lightening. With any type of glued in or taped in extensions, we recommend keeping OLAPLEX off those areas to avoid possibly loosening them. When in doubt, always perform a Strand Test on extensions as results may vary.
